The hair and corrupter stuff are made out of so called "ribbons". Neither my blender addon nor the max plugin support them yet. The problem is that we still don't know enough of the ribbon structure to import and export it properly. You can have a look at the structure RIB_ defined in https://github.com/flo/m3addon/blob/master/structures.xml to see what we currently know about how ribbons get stored.

Finished? You can already import almost every model and export a mesh with animations and particle systems. Just advanced features like proper multi mesh export, lights, cameras, ribbons, forces, displacement materials, volume materials etc. is missing.